Hello,
I'm an MSc student looking for an advice about periodic boundary conditions.

I've modelled 1 metre long pipe, 40mm diameter (see attached).

Boundary conditions defined in ICEMcfd were:
inlet - velocity inlet,
topwall - wall,
bottomwall - wall,
outlet - pressure outlet.
After loading model into fluent I've applied all necessary parameters like materials, BC's, methods and solver. Then I've performed test calculation to see if solution is converging - well it converged (after ~2000 iterations).
Next step is to change bc's into periodic. The goal is to get fully developed flow.